var haloObj=function(){
    this.x=[];
    this.y=[];
    this.alive=[];
    this.r=[];
}
haloObj.prototype.num=5;
haloObj.prototype.init=function(){
    for(var i=0;i<this.num;i++){
        this.x[i]=0;
        this.y[i]=0;
        this.alive[i]=false;
        this.r[i]=0;
    }
}
haloObj.prototype.draw=function(){
    ctx1.save();
    ctx1.lineWidth=2;
    ctx1.shadowBlur=10;
    ctx1.shadowColor='rgba(203,91,0,1)';
    for(var i=0;i<this.num;i++){
        if(this.alive[i]){
           this.r[i]+=deltaTime*0.05;
           if(this.r[i]>100){
               this.alive[i]=false;
               break;
           }
           var alpha=1-this.r[i]/100;
           ctx1.beginPath();
           ctx1.arc(this.x[i],this.y[i],this.r[i],0,Math.PI*2);
           ctx1.closePath();
           ctx1.strokeStyle='rgba(203,91,0,'+alpha+')';
           ctx1.stroke();
        }
    }
    ctx1.restore();
}
haloObj.prototype.born=function(x,y){
 for( var i=0;i<this.num;i++){
     if(!this.alive[i]){
         this.x[i]=x;
         this.y[i]=y;
         this.r[i]=10;
         this.alive[i]=true;

     }
 }
}